i have to explain this on a paper and i dont know how to start
i have to explain this on a paper and i dont know how to start
A dummy is fired vertically upward from a cannon with a speed of 40 m/s. How long is the dummy in the air? What is the dummy's maximum height? sdsdsdsdsdsdsdsdsdsd
How many years will it take scientists to invent teleportation device from now on? And how much money can the person earn by inventing this? Can someone do experiments for this in a laboratory by...
distinguish between noise and music
1. A fireworks shell explodes H=110 m above the ground, creating colorful sparks. How much greater is the sound level of the explosion for a person at a point directly below the explosion than for...
A. What is the period of rotation? B. What is the velocity if the object is 14 cm from the center of rotation? C. What is the centripetal force on a 35 g mass spinning 14 cm from the center...
So, I have been watching a lot of videos on physics, and a few of them have eluded to the fact that light has momentum. For instance, minutephysics video "E=MC2" is incomplete states that...
A heat pump is used to keep a house warm at 22 degrees Celsius. (a) How much work is required of the pump to deliver 2900 J of heat into the house if the outdoor temperature is 0 degrees...
A 10-g sample of a cookie is allowed to dry before putting it in a bomb calorimeter. The aluminum bomb has a mass of 0.615 kg and is placed in 2.00 kg of water contained in an aluminum calorimeter...
The value of specific heat for copper is 390 J/kg⋅C°, for aluminum is 900 J/kg⋅C°, and for water is 4186 J/kg⋅C°. (a) What will be the equilibrium temperature in degrees Celsius when...
A certain cord will break if its tension exceeds 360 N. Suppose the cord is attached to a 0.40 kg ball. If the ball is to be swung with a speed of 25 m/s, what's the shortest length of cord that can...
Powdered steel is placed in a container filled with oxygen and fitted with a piston that moves to keep the pressure in the container constant at one atmosphere. A chemical reaction occurs that produces...
A sled of mass 40 kg is pulled along flat, snow-covered ground. The static friction coefficient is 0.28, and the kinetic friction coefficient is 0.0800. What is minimum amount of force needed to make...
A spaceman of mass 80 kg is sitting in a spacecraft near the surface of the Earth. The spacecraft is accelerating upward at five times the acceleration due to gravity. What is the force of the spaceman...
1. A fireworks shell explodes H=110 m above the ground, creating colorful sparks. How much greater is the sound level of the explosion for a person at a point directly below the explosion than for...
At a building site, an iron girder of mass 400 kg is suspended from a crane by a steel cable. Assume that the cable has a circular cross-section of diameter 24 mm. a.What is the tensile force...
A. New Delhi B. Mumbai C. Allahabad D. None of these
An overhead view of a 12 kg tire that is to be pulled by three horizontal ropes. One rope's force (F1=50 N) is indicated. The forces from the other ropes are to be oriented such that the tire's acceleration...
1. Given that the specific heat of water is 1.00 cal/(g*C), what is the specific heat in Joules/(kg*K)? 2. If 700 grams of a metal requires 95 calories of energy to raise its temperature...
What force is needed to accelerate a 1300 kg car from rest to 20 m/s in 80 m?